Gyratory crusher



Juan@ 4, 31929., J., s. MAAS ET AL. iiw

GYRATORY CRUSHER l Filed Jan. l2, V1924 Patented June 4, 1929.

untreu stares PATENT @FFCEQ JOHN S. HAAS AND' RICHARD BERNHARD, OF AILENTOWN, PENNSYLVANIA, AS- SIGNORS TO TRAYLR ENGINEERING @L MANUFACTURING COMPANY, 0F ALLEN- TOWN, PENNSYLVANIA, A CORPOTION OF DELAWARE.

GYRATORY CRUSHER.

Application lcd January 12, 1924. Serial No. 685,763.

Our invention relates to gyratory Crushers, and especially to the exclusion of dust, grit, or the like from their working parts, bearincg, lubricating systems, etc. We aim to provi e novel means of protection for this purpose, that may be variously adapted and applied to keep dust or the like from entering between gyratory parts and parts that are xed in the sense of not gyrating,-whether truly stationary, rotary, or shiftable in an axial direction. Such locations include, for example (to cite only a few illustrative types of crusher construction), joints between the gyratory member on the one hand and the rotating eccentric and its driving gear o n the other hand, (U. S. Patent No. 463,539 to McCully) or between the gyratory member and the eccentric bearing, (U. S. Patent No. 431,069 to Lowry); or between the gyratory member and a housing on a diaphragm sloping down over the whole driving mechanism of the Crusher, and affording a chute for discharging crushed material. (U. S. Patent No. 535,716 to McLanahan.). In suitable and preferred embodiments (such as that hereinafter described), the invention obviates serious defects of dust-excluding means heretofore employed.

The drawing shows a vertical section through one type of gyratory Crusher equipped with a dust-excluding device or seal conveniently embodying our invention,-the upper part of the Crusher structure being broken away and omit-ted.

A conventional form of gyratory crusher is illustrated, with casing 10 mounted on base 11, and with gyratory member comprising crusher shaft 14 (fulcrumed and suspended for vertical adjustment in any suitable manner, not shown), and its head 15. The base 11 has a central bearing hub 16 for the rcvolving eccentric 17 that'actuates the lower end ofthe shaft 14 to produce the gyratory crushing motion of the head 15. The shaft 14 does not rotate with the eccentric 17, but

merely wobbles as the latter revolves. The bearing 16 is provided with a renewable 1ining 18, and the lower end of the shaft 14 is equipped with a sleeve 19 .for accommodating its vertical adjustment and gyratory wobble, loosely keyed to the shaft at 19a and working in the bore of the eccentric 17. The eccentric A 17 is driven by connections and mechanism including a horizontal countershaft 20 in a bearing 20n in the base 11, a bevel pinion 21 on the inner end of the shaft 20, and' a cooperating bevel gear 22 fast to the lower end of the eccentric.

In the operation of this (or any'other gyratory type of Crusher) the crushed material falls from the narrow openingbetween the head 15 and the casing 10, on its way to discharge, so that large quantities of dust are always present in this region, ready to enter any openings between fixed and gyratory parts and lind their way to any bearings or other operating parts thus accessible. Heretofore, it has been attempted to prevent this by means of an annular sealing member around the Crusher shaft, resting on and sealing horizont-ally with a subjacent fixed .part to accommodate the gyratory motion, and sealing vertically with the gyratory member to vaccommodate vertical movement or shifting,-as for adjustment of the crusher head to vary the size of the crushed roduct. Such constructions, however, have een subject to serious drawbacks: e. g., through rust or the cementing action of the crushed material (or both combined), the sealing ring would freeze to the gyratory member, and thus be lifted and held olf its seat when the gyratory member was subsequently raised for purposes of adjustment; the sealing ring would become jammed to the gyratory member in a cocked position, and thus at once rendered ineffectual; accumulation of damp stone dust would eventually lift the ring off its seat and enter beneath it; through wear, the tightness of the vertical seal would become impaired, without possibility of restoration by any practicable adjustment or replacement of parts.

In the embodiment of our invention here illustrated, there is an annular dust-excluding member Q4 movably engaged and sealed with the gyratory member (in this case at the lower portion of the crushing head 15) to take care of gyratory movement, andmovably engaged and sealed with a stationary, fixed part, to permit vertical adjustment. For this purpose, the member 24 rests and seals horizontally on an annular ledge 25 at the bottom of the crushing head 15, and seals circumferentially, with a journal fit, on the cylindrical upper portion of a fixed stationary dust-excluding housing 26 that encloses the upper ends of eccentric 17 and shaft sleeve 19. In the present instance, the lower portion of the crushing head is outside the annular member 24, and the housing 26 extends up inside of it. In order to maximize the shelter of the joint by the head naturally resulting from this relation of the parts, the upper cylindrical portion of the housing 26 is made as small as consistent with affording safe clearance for the gyration of the shaft 14 inside it. 'lihe lower portion of this housing 26, on the other hand, is flared out and provided. with a horizontal flange 27 for fitting snug against the upper end of the hub 16 to exclude dust. The housing 26 is bolted at 28 to one of the nongyrating or fixed parts, such as the hub 16. lt has a depending shoulder 29 adapted to engage around the eccentric 17 and inside the hub 16 above its lining 1S, and thus aid in the accurate alignment of the parts.

1n thepresent instance, the reentrant conformation at vthe bottom of the Crusher head 15 naturally required by the arrangement of the parts 24, 25, 26, described above is afforded partly by recessing the main head piece itself, and partly by a separate annular dustexcluding member 30, whose inner iange-like portion constitutes the sealing ledge already mentioned. rhis member 30 is bolted fast to the bottom of the head piece 15, with an upstanding shoulder 31 engaged in a rabbeted seat in the head to assure accurate alignment. 1n the present instance, the member 24 not only seats and seals on the ledge 25 at its lower side, but also at its upper side, against an annular shoulder 32 on the main head piece 15. rllhus the member 24 is in effect engaged in an internal groove in the bottom portion of the head 15. Preferably, the member 2st fits this groove with a snug working t, so as to assure dust-tightness without binding or undue friction.

As shown, upper and lower surfaces of the member 24 and the seating surface of the ledge 25 are spherical, and struck from a common center in the axis of the shaft 14, preferably corresponding to the center of suspension and gyration of the shaft; this minimizes wear, gives utmost efficiency of dust-exclusion, and obviates any tendency for the gyratory movement to tilt or cock the member 2-1 on the housing 26, thus allowing the snuggest possible sliding tit of these latter parts to be employed and maintained over an ample width. The seating surface of the shoulder 32 may preferably be likewise spherical, and concentric with the gyration of the shaft 14.

From the foregoing description, it will be seen that contact over ample area is always afforded at all the sealing surfaces, `notwithstanding the gyratory motion of the parts or their vertical movement. Not only are the dust excluding member 24 and all its sealing contacts most effectively sheltered under the head 15 and by the member SOV-without variation in this respect by vertical adjust- :miesen n1ent,-but the member 24 is at all times definitely and positively kept sealed with the gyratory member by virtue of its engagement between the portions 25 and 32 of the latter, each of which holds it sealed i fith the other as against packed material under it, tightness on the part 26or any other influence tending to unseat it. rlhe advantages of this feature are, of course, not dependent on the member 24 being associated with a gyrating partl for relative movement horizontally, as in the present instance.

The-metal parts 24;, 26, 30 involved in the seal are all relatively simple and inexpensive to manufacture, install, or replace, so that wear can readily be compensated for by such replacement. Lateral wear of the sealing ring 2-l-and even wear of the head shoulder 32*can easily be compensated by cutting a thin layer of metal off the upper side of the member 30, without necessity for any replacement whatever.

Besides closing the space between the dust excluding member 21 and the top of the eccentric hub 16, and preventing gyration of the member 24, the protective housing 26 affords an. annular chamber 84 for receiving oil raised to the upper part of the eccentric 17 (by any suitable means, not shown) from a subjacent reservoir 35, through the interior of the eccentric, around the shaft sleeve 19. After .lubricating the bearing surfaces of the parts 1T and 19 on its way to the chamber 34, this oil may be delivered and distributed from the latter to any other surfaces requiring lubrication: e. g., through grooves in the hub lining 18 around the eccentric 17, and `to the counter-shaft bearing 20a via a passage 36 in the hub and a pipe 37 'discharging into a cup on the exterior of the bearingg-into the interior of which it may make its way through holes 2()b in the latter, as usual in such cases. Ultimately, the oil may all return by gravity to the reservoir 35, for recirculation.

ln connection with such a circulatory lubricating system, the security of the sealing means described above is especially valuable;

because the circulation through the chamber -'lmakes it well-neigh inevitable that any dirt entering this chamber will find its way into the bearings and injure them,-if, indeed, it does not block the oil circulation altogether, or otherwise cause a burned bearing and a costly shut-down of the Crusher.

Having thus described our invention, we claim:

l. A seal for a gyratory Crusher comprising a member engaging and sealing horizontally with a gyrating part, for movement relative thereto, and also sealed with a fixed part of the crusher for vertical movement relative thereto.

2. A seal for a gyratory Crusher comprising a member engaging and sealing vertically maracas sealing vertically with a fixed part, to permit such adjustment.

4. A seal for a gyratorypcrusher comprising a member engaging and sealing horizontally with one of the gyrating parts of the Crusher, for movement relative thereto, and means on said gyratory part for holding said member scaled therewith.

5. A seal for a gyratory Crusher comprising a member engaging and sealing circumferentially with one of the relatively gyrating parts of the Crusher, for vertical movement relative thereto and engaging and sealing horizontally with another such part, for gyratory movement relative thereto, and means for holding said member sealed with said latter part.

6. A seal for a gyratory Crusher comprising a member engaging and sealing circumerentially around a fixed part of the Crusher,

-for vertical movement relative thereto.

7. A seal for a gyratory cru-Sherl comprising a member sealing circumferentially wlth a fixed part surrounding the gyratory Crusher shaft, for vertical adjustment relative to said part.

8. A seal for a gyratory crusher comprlsing a member engaging and sealing circumferentially with a xed part of the Crusher, for movement relative thereto, and engaging and sealing horizontally with the gyratory l with as aforesaid.

11. In a seal for a gyratory Crusher, the

combination of a Crusher head having an annular suppoiting ledge at its lower end, and an annular dust excluding member resting on and sealing with said ledge.

12. In a 'seal for a gyratory crusher, the combination of the Crusher head, a supporting ring detachably secured to the bottom of the head and affording an internal ledge beneath the head, and an annular dust excluding member resting on said ledge and sealing therewith.

13. In a seal for a gyratory Crusher, the

combination of a ,crusher head having an annular groove at its lower end, and an annular dust excluding member movably engaged in sacild groove and laterally sealing with its s1 es.

14. In a seal for a gyratory Crusher,A the combination of a crusher head having at its lower end an internal annular groove withy spherically-surfaced sides, and an annular dust excluding member with correspondingly spherically-surfaced sides engaged between the sides of said groove in sealing contact therewith. I

15. A seal for a gyratory crusher comprising a member supported by the gyratory crushing head and sealed therewith for movement relative thereto, and also sealed with a fixed part of the ,Crusher structure for adjustment relative thereto. l

16. A seal for a gyratory crusher comprising, in combination with the eccentric hub'v of the crusher and the gyratory crusher head, an annular dust excluding member supported by the head, and a protective housing mounted on the eccentric hub closing the space between said hub and said dust excluding member, and also preventing gyratory movement of the latter.

17. A seal lfor a gyratory crusher, comprising a dust excluding member carried by the gyratory crushing head and a rigid ring sealed' therewith for relative movement between the two, and said ring sealed at its inner circumference around a fixed part of the crusher structure.

18. In a seal for a gyratory crusher, the combination of the crushing head, and a circumferential bearing ring secured tothe bottom of the head aording a bearing surface beneath the head, and an annular dust excluding member bearing against said ring and sealing therewith, and an extension of the eccentric hub within said dust excluding member cooperating therewith to exclude dust.

19. In a seal for a gyratory Crusher, the combination of a Crusher head having an. annular ring at its lower end, andan annular dust excluding member movably engaged with said ring and sealing therewith andv also with a fixed part of the Crusher structure radially within said dust excluding member.

20. A seal for a gyratory Crusher, comprising in combination with the eccentric hub of the Crusher and the gyratory crusher head,` an annular dust excluding member carried by the head, and a protective housing mounted on the eccentric hub, and a dust ring in Contact with the outside of said housing and closing the space between said hub and said dust excluding member, and also sealed in the radial direction with the eccentric hub.

21. A seal for a gyratory Crusher comprising, in combination with the eccentric hub ot the crusher and the gyratory crusher head, an

annular dust excluding member inovubly en4 gagged with the head, :incl e pioecive housing mounted on the eecentrie hub and Inovably engaged. and cooperating with said member to exclude dust.

22. ln a gyratory Crusher, a gyrating memloer and u xed member, one of Suid members afording e circun'iferentiel sealing gioove,

and :i sealing element sealing horizontally above and below against the opposite sur- 10 feces of said groove.

ln testimony whereof, We have hereunto signed our names at Allentown, Pennsylvania, this fourth dey of January, 1924.

v JUHN S. MAAS.

RHARD BERNHARD. 

